Improvement in cooling beating-engines for paper-pulp



0. L. HAMILTON. Cooling Beating-Engines for Paper-Pulp.

No. 200,828. Patented March 5,1878.

N-FETERS, PHOTO-LITHUGRAPHER, WASHINGTON. D C.

To all whom it may mam.-

TU ED T S PATENT OFFICE.

CHARLES LQ AMI L ON,or'noXBoRoUeH, PENNSYLVANIA.

IMPROVTEMENT m CCOtI NG'BEATING-ENGIN ES FOR PAPER-PULP.

Specification forming part of Letters Patent No. 200,828, dated March 5, 1878; application filed I l December 20, 1876.

Be itknown that I, CHARLES HAMIL TON, of Roxborough, State of Pennsylvania, have invented a new and useful Improyement in Beating Pulp used in the Manufacture of Paper; and I do hereby declare the following to be a full, clear, and exact description or the same, reference being had to the annexed drawings, making part hereof. 7

My lnvention consists of the process of directmg a running stream of water around or upon the shell of the beating-engine, whereby the shell is cooled, and the heat engendered by the process of beating the rags or fibrous nEtteria-l in the interior is continuously carried 0 a To enable others skilled in the art to usemy invention, I will describe it in detail.

In the drawings, Figure l is a vertical crosssection of a Gould beating-engine, with ahalf' outer shell inclosing an annular chamber be tween itself and the shell of the engine. Fig.

2 isa side view of such a beater, with the half outer shell, also showing two openings-br e for the income, and the other for the outlet of the water to and from the annular chamber.

.1 will describe the operation of my device with the Gould beating-engine.

TheGould beating-engine is Well known to I paper-manufacturers, and, requires no special description here. It has a nearly spherical inclosing-shell, made of cast-iron. This shell, in the operation of rapid beating, becomes very hotso much so as to materially and unfavorably affect the sizing and the color, and, inmany instances, the quality of the paper it-' self. The heat acts. very unfavorably upon the fine pulp fiber. This heat is engendered by the rapid action of the beater upon the pulp which comes between it and the bedplate.

-Theobject'of my device is simply to overcome this defect. This I accomplish by bringing in, contact with the main shell acontinuous flowing stream of cool water. h The water absorbs this heat, and the flow carries it off.

In the apparatus which I show, the main shell is supplemented by an outer half inclosing-shell, so much larger than the inner one as to leave an annular space between them.

In the drawings,-A is the main shell of the beating-engine; B, the outer shell above referred to; G, inlet for the water into annular chamber D E, the outlet for the water G, a division in the annular chamber between the inlet and outlet holes, to cause the water to circulate around the whole shell before it escapes.

The outer shell B may be made of wood, cast-iron, or other desirable material. Zinc or galvanized heavy sheet-iron would do, as it is simply required to hold water. It may be extended all around the whole main shell of the beater, or may be placed on the lower half, or may extend in an annular belt or chamber around the largest part of the main shell.

The guide-stops on the inside of the main shell A, which are used to give direction to the motion of the fiber under treatment in the Gould engine, may be made hollow, and a stream of water directed through them; or inner coils may be used, or inner shells or annular chambers, filled with running Water. In

fact, many and various means may be devised to attain the end sought by the above apparatus.

The cool water is run into the annular chamber D through the inlet-opening G from a hydrant, which is connected thereto bya closed pipe. When the annular chamber D is filled, the water commences to run out of the outletopening E. Thereafter the pressure of the water entering at G will continuously force an equal'amount out through opening E, thus securing a steadily-running stream and contact of the water with every part of the main shell covered by the annular chamber.

The water from outlet E is utilized in the subsequent washing of pulp.

The bed-plate or stand of the bed-plate may be made hollow, and a stream of water may be passed through it. g The joints may be filled with red lead, rubber washers, or other packing material, to make them water-tight.

I regulate the supply of water by a stopcock on the inlet-pipe. The annular chamber may be emptied by a similar cock in its lower part.

The same results may be accomplished by having a simple dam o'r upwardly-projecting .high lip around the flange of the shell of the heater, and a stream of water'may be passed around it, or the shell may be partially sunk or immersed in a tank of water. In each case, of course, the water should be continually changed, so as to carry off the absorbed heat.

The same: object may be accomplished: by means of currents of cool air, used in substantially the same way, the object being taming; a flowing cooling agent in contact with the heated parts, whether externally or internally,

- so as not only to absorb, but also to carry ofi the resultant heat, and thus to keep the machine, and consequently its subjective material, eool, and attain better results in manu actura.

CHARLES: L; HAMIIILDN,

Witnesses ALBERT ZAOHERLE, GEORGE E. Enema,

An air-pump or fan may be, eonyeniemtly 

